Conclusions » History » Version 8
Version 7 (HAENNIG, Gerald, 12/14/2015 11:39 PM) → Version 8/15 (HAENNIG, Gerald, 12/15/2015 10:31 AM)
h1. 5. Conclusions
h2 h2. 5.1 Simplified optical link model for transmission of a carrier
The model is based on the Spurious Free Dynamic Range :
h2. 5.2 Link comparison : Optical link vs Coaxial Cable for 30 m link length (like in a home)
In the following table, there is a comparison between coaxial cable to optical link.
|_. Parameter|_. Coaxial Cable|_. Optical Link |
|RF Gain @ 950 MHz [dB]|-3.6 |+0.5|
|RF Gain @ 2150 MHz [dB]|-5.6|+3.0|
|Noise Figure @ 950 MHz [dB]|+3.6|+30|
|Noise Figure @ 2150 MHz|+5.6|+33|
|IIP3 [dBm]|+50 |+10|
|SFDR [dB/Hz2/3]|+145|+102|
|LNB remote supply|Yes|No, supply close to antenna for OTX required|
|Current Consumption [mA]|0|700 mA / 12 V|
|LNB telecommand|Yes|No|
|Bidirectional link|Yes|Yes, but with additional hardware|
|Cost|Low|High|
For a distance of 30 m, optical link is not justified : performances and cost are not competitive with coaxial cable.
h2 h2. 5.1 Simplified optical link model for transmission of a carrier
The model is based on the Spurious Free Dynamic Range :
h2. 5.2 Link comparison : Optical link vs Coaxial Cable for 30 m link length (like in a home)
In the following table, there is a comparison between coaxial cable to optical link.
|_. Parameter|_. Coaxial Cable|_. Optical Link |
|RF Gain @ 950 MHz [dB]|-3.6 |+0.5|
|RF Gain @ 2150 MHz [dB]|-5.6|+3.0|
|Noise Figure @ 950 MHz [dB]|+3.6|+30|
|Noise Figure @ 2150 MHz|+5.6|+33|
|IIP3 [dBm]|+50 |+10|
|SFDR [dB/Hz2/3]|+145|+102|
|LNB remote supply|Yes|No, supply close to antenna for OTX required|
|Current Consumption [mA]|0|700 mA / 12 V|
|LNB telecommand|Yes|No|
|Bidirectional link|Yes|Yes, but with additional hardware|
|Cost|Low|High|
For a distance of 30 m, optical link is not justified : performances and cost are not competitive with coaxial cable.